Replaces #active_children with nested scopes #descendants.active

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/work@2152 e93f8b46-1217-0410-a6f0-8f06a7374b81

nested_projects/app/models/project.rb

@@ -203,10 +203,6 @@ class Project < ActiveRecord::Base
     end
   end
   
-  def active_children
-    children.select {|child| child.active?}
-  end
-  
   # Returns an array of the trackers used by the project and its sub projects
   def rolled_up_trackers
     @rolled_up_trackers ||=